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Old 28-05-2015, 23:00   #1
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Water pressure switch question.

This is part of my freshwater pressure system which blew it's head off last week. I think it is a pressure switch used to turn my water pump on and off but I am not sure. Can anyone identify it for me.
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Old 29-05-2015, 00:10   #2
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Re: Water pressure switch question.

It looks a lot like a Whale inline electric galley pump. I've never seen a pressure switch that looks like that.
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Old 29-05-2015, 01:36   #3
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Re: Water pressure switch question.

Yeah. That looks like it.
So it may be an obsolete pump. We currently have a much larger pump that presurises the whole system. Is it likely that our main pump has a built in pressure switch, making this obsolete.?

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Old 29-05-2015, 07:21   #4
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Re: Water pressure switch question.

Yes that would be my guess. Pressure switches are almost always mounted on the pump.
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Old 29-05-2015, 09:44   #5
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Re: Water pressure switch question.

I have never seen a pressure cut off switch that looked like what you are showing. But it still might be one, you won't know for sure until you remove it from your plumbing system and check it out.

I just had to replace the pressure cut off switch on my freshwater pump, ITT Jabsco replace the switch very nicely. I include a picture of it
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Old 29-05-2015, 10:41   #6
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Re: Water pressure switch question.

That looks like a demand pump.
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Old 29-05-2015, 11:16   #7
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Re: Water pressure switch question.

the best pump sw i have found, is the 'Square-D' well pump switch...they are available at most hardware stores, for about $15! look for one that is 'on at 20 Lbs, off at 40 Lbs'...mine has been working for over 15 yrs, and i have a spare just in case! just put a tee in the output/pressure line/pipe, go to the sw, cut the wire on the pump that goes to it`s own pressure sw, and wire it to the square d switch...i don`t buy the normal potable water pumps anymore, i get the lower pressure washdown pump. i also have a pressure gauge in line. when this sw turns on the pump, it`s instantly, and when it gets to the 40Lb shut-off pressure, it`s not a slow process, it`s just 'clunk' and it`s off! it anyone buys anything else, they`re wasting their money!...clyde
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Old 29-05-2015, 14:26   #8
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Re: Water pressure switch question.

Great advice guys. Thanks. I will bypass it today and post the results.
Jeff.

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Old 29-06-2015, 23:03   #9
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Re: Water pressure switch question.

Gent's.
It has taken me longer than I initially thought it would.
Turns out that it is an inline pump which was used to pump water into our hot water system which we have never used becaouse we didn't know how it worked.
I have removed it and can replace it but I am hesitating because I am no quite shore that it was set up correctly.
I am hoping someone is formiliar with these pumps and could tell me if they are ok to have hooked up into A pressurised water system? As it was the water pressure that blue the old one apart.

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Old 29-06-2015, 23:27   #10
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Re: Water pressure switch question.

If the line is already pressurized I don't see any need for a pump in that location.
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Old 29-06-2015, 23:33   #11
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Re: Water pressure switch question.

Yep. I tend to agree with you. The hot water tank is about 800mm or 2.5feet above the cabin sole. Maybe it was to add additional pressure for the hieght.
I actually think that there is plenty of pressure already in the system to do the heavy lifting. After all, it was the water pressure that blew the pump apart in the first place??
Are these pumps meant to be used in a pressurised system?
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